If your car accelerates from rest at a steady rate of 4 m/s2, how soon will it reach 81 km/h (50.3 mph or 22.5 m/s)?

Answer 1

Current velocity = (time)*(acceleration) + initial velocity
22.5 = time*4 + 0
time = 22.5/4 = 5.625 seconds

Answer 2

5.6